Plenty of such things exist, and I (and everyone I know) generally avoid visiting them. There is simply too much spam, trolling, hate speech, wrong information, ads, off-topic conversations..

Turns out moderation is actually useful if you want to have interesting conversations.

We get what we've paid for. I wouldn't want the thankless work for free job.

We tried that but they filled up with spammers and morons. Other people who are neither don't want to use those systems. It's the Nazi bar effect, but for spam.

Somewhere between there, and "recite these falsehoods someone paid us to make you recite or get banned", there may or may not be a point that's actually okay.

We had it. It's still out there. NNTP (and ignore cancel messages if you dare).